JPEG images from the Canon EOS 7D compare reasonably well against the newer 24.3 million pixel Sony Alpha 77, and whilst at the lower end of the sensitivity scale the 12.3 million pixel Nikon D300s has the edge, at sensitivities above ISO 800 the Canon EOS 7D shows better low light performance.

Raw images

Canon eos 7d review: raw signal to noise ratio

TIFF images (after conversion for raw) from the Canon EOS 7D have better signal to noise ratio results than those from the Nikon D300s, but it is out performed by the Sony Alpha 77 and Pentax K-5.

Dynamic range

Canon eos 7d review: jpeg dynamic range

This chart indicates that the Canon EOS 7D's JPEGs capture a good amount of tonal detail across the sensitivity range, beating the Nikon D300s at all sensitivities except ISO 800. However, it is out performed by the Sony Alpha 77 and Pentax K-5.

Raw images

Canon eos 7d review: raw dynamic range

TIFF images (after conversion from raw) show a similar trend to the JPEG files with results showing a higher dynamic range than the Nikon D300s at all sensitivities except ISO 800. Again, it is out performed by the Sony Alpha 77 and Pentax K-5 though.